Physics MCQ Set-03

What is the SI unit of length?

• centimeter

• meter

• kilometer

• millimeter

How is acceleration defined in physics?

• Acceleration is the rate of change of velocity per unit time.

• Acceleration is the speed of an object at a given moment.

• Acceleration is the distance traveled over time.

• Acceleration is the force applied to an object.

What unit is used to measure force?

• Pascal

• Joule

• Watt

• Newton

If an object is accelerating, what can be said about the forces acting on it?

• There is no force acting on it.

• There is a net force acting on it.

• The forces are balanced.

• The object is at rest.

What is the formula for calculating acceleration?

• a = v_f + v_i

• a = v_i / t

• a = (v_f * v_i) + t

• a = (v_f - v_i) / t

What is the unit of measurement for mass in the SI system?

• gram

• liter

• pound

• kilogram

How does mass affect the acceleration of an object when a force is applied?

• Greater mass always results in greater acceleration for the same force.

• Mass has no effect on acceleration when a force is applied.

• Mass inversely affects acceleration; greater mass results in less acceleration for the same force.

• Acceleration is independent of the mass of the object.

What is the relationship between force, mass, and acceleration according to Newton's second law?

• F = m * a

• F = a - m

• F = m / a

• F = m + a

What is the difference between speed and velocity?

• Speed is scalar; velocity is vector (includes direction).

• Speed can be negative, while velocity cannot.

• Velocity measures distance only, not direction.

• Speed is always greater than velocity.

How do you convert kilometers per hour to meters per second?

• Divide the speed in km/h by 3.6.

• Multiply the speed in km/h by 3.6.

• Add 3.6 to the speed in km/h.

• Convert km/h to miles per hour first.